Medium-wave refrigeration infrared zoom lens additionally provided with zoom lens group

Abstract

The invention discloses a medium-wave refrigeration infrared zoom lens additionally provided with a zoom lens group. The zoom lens group which is detachable relative to the zoom lens is additionally arranged on the basis of an original optical system group. The original optical system group comprises a front fixed group, a zoom group, a compensation group, a focusing group and a rear fixed group which are sequentially arranged along an optical axis from an object side to an image side, wherein the zoom lens group comprises a first positive meniscus lens and a second negative meniscus lens which are sequentially arranged along the optical axis from the object side to the image side. According to the invention, focal length amplification can be realized on the basis of the original optical system, and the imaging quality is not affected. The zoom lens group realizes the assembly and disassembly relative to a lens cone though bolts, is simple in structural design and easy to disassemble and assemble, convenient to change the focal length, and capable of meeting different application requirements.

Description

technical field [0001] The invention relates to the field of optical technology, more specifically, a medium-wave cooling infrared zoom lens with a multiplier lens group. Background technique [0002] The infrared optical system has the advantages of strong night penetration ability, strong ability to identify camouflage, passive reception of infrared radiation, good concealment, and less susceptible to interference. It has shown special capabilities in weapon systems in military fields such as land, sea, and air. With the development of infrared imaging technology, infrared zoom system is widely used in guidance, monitoring, infrared forward vision, target detection and tracking and other fields. Compared with fixed-focus lenses and step-by-step lenses, continuous zoom lenses can not only capture targets in a large field of view, but also adjust to a small field of view to aim at and track targets after the target is found. And in the process of focal length and field of v...

AI Technical Summary

Problems solved by technology

However, the current infrared zoom lens designed with a cooling detector has only one focal length range. For different focusing ranges, it is necessary to design a set of infrared zoom lenses. Designing a new set of lenses is difficult and complex in structure.

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